He doesn't give a specific explanation and sounds quite positive in his latest ig posts.
https://www.instagram.com/p/BQ-n8zglKnS/?taken-by=tenis_den
https://www.instagram.com/p/BRAzl98F0IB/?taken-by=tenis_den
This is what google translate makes of Denis' 2nd message:
"So many warm messages. Thank you all for your attention. But nothing terrible will happen, it's a sport, there are ups and downs. There are also holes acclimatization, physical decline, and other components. Home play "pure". Learn from mistakes. Get up and continue to work. This I have been doing for 18 years. Everything is good. I have another plans. I'll see you at the World Cup."
He was in pretty good shape at the Winter Universiade just a few weeks ago. Sounds like it was a combination of unfortunate circumstances for him at the AWGs?

hwell: (Unless there are indeed more severe reasons again that he doesn't want to reveal.

)
Keeping my fingers crossed for a much better showing at Worlds and that he can troll himself onto the podium again. It seems unlikely, but if I've learned one thing it's that one should never count out the mighty Kazakh Ice Prince!